Electric motor.



No. 672,950. Patented Apr. 30, 1901. F. A. MERRICK & J. D. FORRER.

ELECTRIC MOTOR.

{Application filed Aug. 18, 1900.)

{No Modei.)

WITNESSES: & m. QMZZ.

mm A Tram/Er.

THE NORRS PETER5 CO, PHOTO-LITNQ, WASNINGTON, D C.

UNITED STATES PATENT OFFICE.

FRANK A. MERRICK AND JOSEPH D. FORRER, OF JOHNSTOXVN, PENNSYLVA- NIA,ASSIGNORS TO THE LORAIN STEEL COMPANY, OF PENNSYLVANIA.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 6'7 2,950, dated April30, 1901.

Application filed August 16, 1900. serial No. 27,051. (No model.)

To all whom, it may concern:

Be it known that we, FRANK A. MERRIOK and JOSEPH D. FORRER, ofJohnstown, in the county of Oambria and State of Pennsylvania, haveinvented new and useful Improvements in Electric Motors, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, which form a part of this specification.

Our invention has relation to certain new and useful improvements inelectric motors, and is designed mainly to provide means whereby thearmature-shaft of the motor may be readily removed from thearmature-body without dismembering the latter and without disturbing thecommutator and commutator connections. Our invention is also designed toaccomplish the above-stated object by a simple and efficientconstruction involving a minimum amount of machine-work and fitting. Weattain these and other minor objects by the novel construction,arrangement, and combination of parts, all as hereinafter described, andpointed out in the appended claims, reference being had to theaccompanying drawings, in which Figure 1 is a central longitudinalsection of a motor embodying our invention, with a small portion of thearmature shown in side elevation. Fig. 2 is a cross-section on the line2 2 of Fig. l, and Fig. 3 a detail view of the locking-ring.

Describing the figures more particularly, 5 the letter A designates thearmature-shaft, having an enlarged portion A, on which are seated theback armature-head B and also the laminated body 0 C, the end laminae 0being preferably of somewhat thicker or heavier stock than theintermediate laminae G.

D is the front head, which is seated on the shaft A against the shouldera, formed by one end of the enlarged portion A, and which is formed withan elongated tapered hub D, 5 on which is seated the commutator E.

F designates the oil-guard at the commutator end of the armature, and Ethe corresponding guard at the pulley end.

9 is a keyway formed in the portion A of the shaft A, and G is a keyseated therein and securing the head 13 and laminae O 0 against rotarymovement.

H designates elongated bolts (in the present instance three in number)which extend longitudinally through the two heads and the intermediatelaminte and which are also extended through the commutator-body. On oneend of each bolt is a nut h, which is screwed up tightly against thehead B, and on the opposite end is a second nut h, which is screwed upagainst the commutator-body. On the intermediate portion of each bolt isa third nut 71 which sets up tightly against the head D. In lieu of thisthird nut we may employ simply a collar or shoulder on the bolt. Thenuts when used may be prevented from turning by a bearing d on the hubD.

The oil-guard E is drawn to its seat 011 the shaft A and is formed withsockets or recesses e, which engage the nuts h, preventing them fromturning by reason of such engagement.

In a similar manner the nuts h lock and are locked by the oil-guard F.

Endwise displacement of the armaturebody is prevented by means of alocking-ring K, which is partially seated in the shaft A against the endof the hub D. This ring is in turn held against displacement by theoilguard H, which is shouldered over it.

To remove the armature-shaft, the oil-guard F and the ring K are firstremoved. The shaft can then be drawn out from the pulley end withoutdisturbing the armature-body of the commutator.

The head D is preferably formed with a chamber D in which molten metalor other suitable weights may be placed forthe purpose of balancing thearmature.

P P designate the bearing-sleeves in which the armature-shaft isjournaled and which are supported in the end portions 0 of the frame.These sleeves are each formed with a flange p at its inner end, whichseats against the end of the inwardly-proj ecting sleeve-support. Eachsleeve is also formed with a groove p, which is engaged by a pin or studp ,carried by the sleeve-support. The flanges 19 hold the sleevesagainst endwise outward displacement, and the pins or studs 19 securethem against any tendency to rotate. The

sleeves must of course be seated from the inside of the frame. Thesefeatures are not, however, part of the present invention, but areclaimed in the application of F. A. Merrick, Serial No. 27,566. I

WVe do not wish to limit ourselves to the exact construction,combination,and arrangement of parts herein shown and described, itbeing obvious that various mechanical changes may be made in the detailsthereof without departing from the spirit and scope of our invention aspointed out in the appended claims.

Having thus described our invention, what we claim, and desire to secureby Letters P-at cut, is

1. In an armature, the combination with a non-threaded shaft having anenlarged portion, a head seated on said enlarged portion, an oppositehead seated against the shoulder formed by one end of said enlargedportion, the laminated body between said heads, and clamping-boltspassing through said body and heads, together with a locking deviceremovably secured to the shaft to prevent endwise movement thereofthrough the said body and heads.

2. In an armature, the combination with a shaft having an enlargedportion, a head seated on said enlarged portion, an opposite head seatedagainst the opposite end of said enlarged portion, and having anextended hub, a commutator seated on said hub, alaminated body betweenthe said heads,and clamping-bolts extending through said body and headsand also through the com n1 u tator-body.

3. In an armature, the combination of a shaft, a pair of heads seatedthereon, one of said heads having an extended hub, a laminated bodybetween said heads, a com mutator seated on said hub, and clamping-boltsextending through said heads and body, and also through thecommutator-body.

4. In an armature, the combination of a shaft, a pair of heads seatedthereon, one of said heads having an extended hub, a commutatorseated onsaid hub, a laminated body between said heads, and clamping-boltsextending through said heads and body, and also through thecommutator-body, said bolts having a nut at both ends, and also anintermediate abutment for one of said heads.

5. In an armature, the combination with the shaft, the heads thereon,the laminated body between said heads, and a comm utator seated on anextension of one ofsaid heads, of clamping-bol ts extending through thesaid body and heads and also through the body of the commutator, nuts onthe said bolts, and an oilguard secured on the shaft and locked by andlocking the said nuts.

6. In an armature, the combination of a shaft, armature-heads thereon,an armaturebody clamped between said heads, a commutator, bolts passingthrough said heads, body and commutator, and having clamping-nuts eachof said guards having sockets or re cesses which receive the nuts on theadjacent ends of said bolts, whereby the nuts and also the guards areprevented rotary movement on their respective seats.

7. In an armature, the combination of a shaft, armature-heads seatedthereon, a laminated body clamped between the said heads, a commutatorseated on the hub portion of one of said heads, a locking-ring seated inthe shaft, and engaging the end of said hub, and an oil-guard fittingover and securing the said ring.

8. In an armature, the combination of a "shaft, armature-heads seatedthereon, a laminated body between the said heads, a commutator seated onthe hub portions of one of said heads, bolts extending longitudinallythrough the said heads, body and commutator, nuts on said bolts whichseat against the commutator, alocking-ring seated in said shaft andengaging the end of the said hub portion, and an oil-guard fitted overthe said ring and also having sockets or recesses which engage the saidbolts.

9. The combination of an unthreaded armature-shaft, an armature-bodythereon having its plates or laminae directly engaging said shaft, andmeans for normally preventing the shaft from moving endwise in said bodybut capable of being released to permit said shaft to be withdrawnwithout dismembering any portion of the body.

10. The combination of an armature-shaft, an armature-body having itsplates or laminae directly keyed to the shaft, an abutment on the shaftfor preventing separate endwise movement of the shaft and body in onedirection,and a removable locking device which normally prevents suchmovement in the opposite direction, but which can be released to permitthe shaft to be withdrawn through said body.

11. The combination of an armature-shaft, an armature-body having itsplates or laminae keyed directly to the shaft, armatureheads fitting theshaft but not secured thereto with respect to endwise movement, anabutment on said shaft engaged by one of said heads to prevent endwisemovement in one direction, and a removable locking device for normallypreventing such movement in the opposite direction.

12. In an armature, the combination of a shaft having a shoulder orabutment thereon, an armature-body keyed directly to said shaft andengaging said shoulder or abutment to prevent separate endwise movementof the shaft and body in one direction, and a removable locking devicesecured on said shaft and engaging the head to prevent endwise movementin the opposite direction.

13. The combination of an armature-shaft having a shoulder or abutmentthereon, armature-heads seated on said shaft, one of said heads seatingagainst said shoulder or at their ends, and oil-guards on said shaft,

abutment, a locking device removably secured to the shaft and engagingthe opposite side of said head, and an armature-body separate endwisemovement of the body and 15 shaft, but which can be released to permitsaid shaft to be Withdrawn through said body without disturbing any partof the body, and a commutator-support connected to and carried wholly bysaid body.

In testimony whereof We have affixed our signatures in presence of twowitnesses.

FRANK A. MERRIOK. J. D. FORRER.

WVitnesses:

B. M. SMITH, H. W. SMITH.

